Fade deselected bars when brushing

frontend/src/metabase/visualizations/lib/graph/brush.js

@@ -37,6 +37,7 @@ export function initBrush(parent, child, onBrushChange, onBrushEnd) {
 
         // emit "onBrushChange" event
         onBrushChange(range);
+        parent.fadeDeselectedArea();
 
         // return filters unmodified
         return filters;